Marker foundation



FIG. 1 is a perspective view of the marker foundation of the instant invention with a vase insert;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front side view thereof;

FIG. 5 is a back side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof. 

CLAIM The ornamental design for a marker foundation, as shown and described. 